Johnson Controls VA-9070 Series User manual

Brand: Johnson Controls

Model: VA-9070 Series

Type: User manual

This manual is also suitable for

VA-9070

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating

Service Installation Instructions

Mounting

When mounting the actuator in the standard position,

orient the actuator with its handwheel in a vertical plane

and parallel to the pipeline. When mounting the

actuator on a vertical pipe, position the acutator with

the conduit entries on the bottom to prevent

condensation from entering the actuator by way of the

conduit. In all cases, position the conduit to prevent

drainage into the actuator.

Mount the actuator to the valve using the following

procedure:

1. Manually operate the actuator until the output shaft

of the actuator lines up with the valve stem. If

possible, use an intermediate position (such as

valve disc/stem and actuator half-open).

2. Place the proper sleeve adaptor (if required) onto

the valve stem. Apply a small amount of grease to

the sleeve adaptor to ease assembly.

3. Install the furnished mounting studs by threading

them all the way into the actuator base. (Insert the

short, threaded length into the actuator.)

4. Mount the actuator onto the valve stem. Be sure

the mounting studs are properly aligned with the

holes in the top plate of the valve or the mounting

bracket. If necessary, manually override the

actuator to align the mounting studs with the

mounting holes.

5. Lower the actuator onto the valve, and secure it

tightly in place with the furnished hex nuts and lock

washers.

Wiring

Connect the actuator to field wiring:

• The heaters use approximately 0.5 amperes at

110 volts.

• Remove the metal conduit plug for the power

connection. Each actuator has two conduit entries

(one for power and one for control). The remaining

square-head conduit plug is weatherproofed but

may eventually degrade. If the square-head

conduit plug degrades, replace it with a metal plug.

• The motor full load current is noted on the

nameplate of the actuator. The terminal strip

accepts wire sizes ranging from 10 to 22 AWG

(12 to 22 AWG for the servo). Do not use wire

smaller than 18 AWG.

• Terminate all field wiring at the actuator terminal

strip in accordance with the wiring diagrams

attached to the inside of the actuator cover.

• Properly seal the conduit connections to maintain

the weatherproofed integrity of the actuator

enclosure.

Setup and Adjustments

You must set the electrical travel switches to trigger

prior to reaching the mechanical travel stops. The

travel switches are labeled for open and close. The

cams are color-coded (green for open; red for closed).

Manual travel stops are designed to prevent manual

overtravel, not to stall the electric motor. The travel

stops have an adjustment range of approximately

10 degrees.

Closed Travel Switch and Travel Stop

Adjustment

1. Loosen the mechanical stop for the closed

position, and back it off so that it does not interfere

with actuator travel. The closed stop is located on

the right when viewed from the travel stop side of

the actuator.

2. Remove the indicator rotor by pulling it up. This

action exposes the machined groove on the end of

the camshaft, which is the reference for the valve

disc position.

3. Manually operate the actuator handwheel

Clockwise (CW) until the valve reaches the desired

closed position.

4. Rotate the red adjusting knob (by hand or with a

flat-head screwdriver) until the cam lobe barely

trips the switch from a CW direction.

Note: If the rotation of one cam moves the other cam,

hold the other knobs or cams during adjustment.

VA-9070 Series Electric Rotary Actuators for Two-Position

and Modulating Service

Installation Instructions

Code No. LIT-977322

Issued May 29, 2007

Supersedes March 14, 2005

Published in U.S.A. www.johnsoncontrols.com

VA-9070 Series Electric Rotary Actuators for Two-Position and Modulating Service Installation Instructions2

Metasys® is a registered trademark of Johnson Controls, Inc.

All other marks herein are the marks of their respective owners.

Controls Group

507 E. Michigan Street

Milwaukee, WI 53202

5. With the travel switch in the closed position, rotate

the handwheel one-half turn CW, then turn the

closed travel stop CW until it bottoms out against

the output gear. Lock the travel stop bolts.

Open Travel Switch and Travel Stop

Adjustment

Manually operate the actuator handwheel

Counterclockwise (CCW) until the valve is fully open.

Follow the same procedure as outlined in the Closed

Travel Switch and Travel Stop Adjustment section,

except use the green cam (open) and the travel stop

located on the left side (as seen when viewed from the

travel stop side of the actuator).

Servo Commissioning

Ensure that the travel switches and travel stops are set

properly before calibrating the servo. Use a controlled

and known command signal source. Factory-installed

servos are pre-calibrated.

Setting the Input Control Signal

Set the input control signal for the input type used. See

Table 1.

Setting the Potentiometer

1. Manually operate the actuator handwheel until the

unit is in the fully closed position.

2. Rotate the black potentiometer drive gear

adjustment knob to barely engage the

potentiometer gear segment at the closed position.

3. Manually operate the actuator to the fully open

position.

4. Fine-tune the potentiometer adjustment at this end

to equalize the difference between the ends. The

potentiometer gear segment should maintain

engagement with the drive gear throughout full

actuator travel.

Setting the Servo

1. Wire the input signal to the incoming command

signal terminals. Ensure that you maintain proper

polarity when making wiring connections.

2. Connect the power supply and activate the

actuator.

3. Check the Status Light-Emitting Diode (LED).

• If the red Status LED is flashing, refer to the

Servo Troubleshooting section in the

VA-9070 Series Electric Rotary Actuators

Technical Bulletin (LIT-977325).

• If the green Status LED is flashing, press and

hold the CALIBRATE button until the green

Status LED flashes rapidly (approximately

2 seconds), then release the CALIBRATE

button. The servo drives the valve to the open

and close travel limit switch settings. When the

calibration is complete, the green Status LED

resumes flashing at the normal rate.

• If the Status LED alternately flashes red, then

flashes green, the calibration has failed. To

resolve the problem, refer to the Servo

Troubleshooting section in the VA-9070 Series

Electric Rotary Actuators Technical Bulletin

(LIT-977325).

4. After calibration is complete, apply the desired

minimum and maximum input signals, and observe

the actuator operation through one full cycle for

proper operation.

Repair Information

If the VA-9070 Series Electric Rotary Actuators for

Two-Position and Modulating Service fails to operate

within its specifications, replace the unit. For a

replacement VA-9070 Series actuator, contact the

nearest Johnson Controls® representative.

Table 1: Input Control Signal Switch Settings

Switch Input Signal

4 to 20 mA DC 0 to 5 V DC 0 to 10 V DC 2 to 10 V

1 OFF ON ON ON

2 OFF OFF ON ON

3 OFF OFF OFF ON

Johnson Controls VA-9070 Series User manual

Brand: Johnson Controls

Model: VA-9070 Series

Type: User manual

This manual is also suitable for

VA-9070

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Johnson Controls VA-9070 Series User manual

This manual is also suitable for

Johnson Controls VA-9070 Series User manual

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